Globular sodium bisulphate and method of making the same



May 29, 1928.

C. P. LINVILLE ET AL GLOBULAR SODIUM BISULPHATE AND METHOD OF MAKING THE SAME Original Filed Dec. 18, 1924 Patented May 29, 1928.

UNITED STATES PATENT Orr-ICE. i

CLARENCE. P. LINVILLE, 0]! ELIZABETH, AND CARL I. 'IINSIHG, OI HIW JERSEY, ASSIGNOBS TO CALCO CHEMICAL COHPANY, OI BOUIDBBOOI, m In- SEY, A CORPORATION OF NEW JERSEY. i

enoaum semen msunrm'ra AND Israel) or wt} Application ma December 16, 1624, Serial m. (50,848. Renewed lepton-bet i7,

This invention relates to an entirely new product, namely, sodium bisulphate in globular form and which is so distinctly novel as to impart to.it distinct physical and chemical characteristics not possessed by any sodium bisulphate heretofore made. Moreover, the characteristics adverted to materially enhance'the field of usefulness of the product as well as to pronouncedly increase its efficiency of operation, and, more particularly, as a cleansing agent.

Sodium bisulphate is extensively used as a general detergent and cleansing a ant and has especial merit and utility in c eansing toilet bowls, because of its solvent action on the tenacious scums, residues and discolorations which accumulate thereon.

The commercial bisulphate usuall carries some water of crystallization, an moreover, it is quite hygroscopic. The result is that when packaged in the cans, as customary, and particularly after exposure to air, it packs and cakes so solidly as to render its use very troublesome, as well as to detract very materially from the eflicient operation it possesseswhen used under favorable conditions. In fact, it must be dug out of the can by using a more or less pointed instrument.

Notwithstanding the enumerated disadvantages, and others, were well known, and that certain make-shift expedients were re sorted to with a view to overcoming them, yet, the disadvantages, in the main, have persisted in the trade for upwards of twenty years and have strongl militated against a more general use of tie product. The manufacturers, presumably, viewedthe difliculties as ones necessarily inherent in the normal characteristics of its product, and, as such, looked upon the problem as unsolvable.

It is Well known that bisulphate becomes anhydrous above 0., and fuses at about 300 C. Accordingly, the mere fusion of the salt has a pronounced benefit in diminishing the disadvantages adverted to.

As the result of extended, scientific investigation and experiment, we have discovered how to convert sodium bisulphate into a globular form, and possessing such physical and chemical characteristics as to entirely obviate the disadvantages inherent in the salt as now marketed. These globules of sodium sulphate have a hard, glazed exterior which precludes the occurrence of" a detrimental hy roscopic action on them,

and, moreover, w at is of vital importance,

the globular form results in amiminum of" 7 surface contact, there being, theoretically, POlllt contact only among the little spheres,fl

so that, on this account, and for the otheg reasons given, the new form of the salt ca be packaged without in any wise massing,

and, when it is desired to use the same, it y can be fed or delivered from the ordinary sitter top can.

With a view to partially overcoming the disadvantages inherent in ground sodium bisulphate, some manufacturers have ad-- mixed talc therewith, but this is a meremake-i shift attendant with disadvantages, per se, and falling far short of solvin the real difliculties in the problem which tvention has solved.

The accompanying drawings illustrate, somewhat diagrammatically, a ty of apj-f paratus which has been success ully .emH

ployed in making the novel product of this invention.

Referring to the drawings, 1 desi nates a, centrifugal distributor, whlch, as s own,

is of substantiall bowl-shaped configuration. In the pre erred form of the inven tion, said distributor comprisesa flat bot tom portion 2 having a c rcular periphery provided at its outer part, with an upwardly and outwardly inclined wall 3." It will be noted that the bottom of the centrifugal dis-f. 'tributor is shown as closed. This is an important feature of construction, sincethis element, in structures of the prior art,"1s

usually provided with a stufling box, the use I of which, in operating on fused salts, is, manifestly, impractical.

The distributor 1 hasaflixedthereto an axial spindle 5, which is mounted in suitable bearings (not shown) for rapidly revolvw ing the, distributor, and while this rotation may be imparted to it by any suitable prime mover, a motor 6 positioned above the distributoris shown as illustrative.

The fused sodium bisulphate is contained in a reservoir 7 having an outlet pipe 8 leading to a point above the bottom of the rotor and near the axis of rotation thereof, and,

a valve 9 is preferably included in the pipe 1e present in- 8 for controlling the feed of the y it reaches the base of the wall 8.

rial through said pipe. I

The operation of the ap aratus Ill-i130 apparent, but maybe bri y described'as follows;

If, for example, the mass 10 of the: fused,';;

sodium bisulphate is contained in the recepres, and then tacle 7, with which suitable heating means may be asociated to maintain the fluidity of face.

the sulphate, it .will be a parent that-the opening of the valve 9 wi allow this material to flow to thedistributor. The dis tributor is'prefer ably heated, prior to introducing the material thereon, so that such material upon engagement with the distributor is not unduly cooled. As thematerial is deposited at substantially the center of the bottom 2, it will respond to centrifugal force and will be driven over the flat bottom of the distributor as a film or la er unftzlil I tri gal force will cause it to continue the outward flow, but such further flow will be opmanufacture.

posed by the inclined wall which will so retard it that the material will creep u the wall 3 in a relatively thin film whic becomes thinner as it proceeds higher along of the wall, it will be thrown of ina divided globular form.

In the treatment of bisulphate of soda, the material, after be' thrown ofi the distributor, and finely di iiied, will solidify during this falling movement. In practice, the operations described are preferably carried on within a suitable chamber or casing made sufficiently deep, that, by the time the material reaches the base 'of'the chamber, it will have solidified in globules.

When the lobules of sodium bisulphate are dischar into a li uid, they are uniformly solu Is and enter into solution rapid- 1y with the result that the dissolving operatron is effected much more expeditiously,- ficiently and uniformly than isthe case with the commonl used ground material.

In usi e new product, we'may, if we desire, a mix additional ingredients'therewith to make cleaners for special We wish it understood that the term phate of soda, used throughout the fore v etail demription and in the :ppend claims, does not 11 imply at such material must be chemi y pure, but, as a matter of fact, it may partake of any of. its commercial forms, such, for example, as nitre cake, a by-product 'from nitric acid The scope of the present invention is commensurate with the p d'ed claims.

Having thus fully descri the invention, what we claim as new and desire tosecure by Letters Patent is:

1. The herein described method ofpro-f soon as' they are formed, and caus' to fall in spaced relation to one anot er for ducing bisulphate in fine globular form and? substantially non-hygrosco ie which in= liqu'efyi the salt y fusion, then. it out y centrifugal force, then breaking it up into small subtially globules by centrifugal cool and harden. roughout their entire sur- 2. The herein described method of producing sodium bisulphate in line globular form and substantially nonygroscopjic Y which consists in liquefying the salt fusion, then filming it out by centrifugal force, then breaking it up into mnall substantially smoothglobules by centrifugal force, and then allowing the thus formed globules to fall a sulficient distance through space to cool and become hard throughout t eir entire surface. 3. The herein described method of producing sodium bisul hateirufine, smooth,

rmitting the globules to hard surfaced globu r,form and substantially non-hygroscopic which consists in I liquefying the salt b fusion and then breaking it up into globu es by centrifugal action. 4. As a new roduct sodium acid sulfate in the form of g obular, denseilhard, smooth,

non-porous, discrete particles aving a pearly ap ance.

5. -a new article of manufacture, so-

dium bisulphate in the form of small globules, the surfaces of which are hard and laaed.

6. The method of producing sodium bisulphate in globular form aving hard, smooth surfaces, which consists in liquefying the saltby fusion, breaking the liquid into small drops, scattering said drops unrestrictedly in difierent directions in a 1 1 us medium as soon as they-are'form, and cansing them to fall in spaced relation to one another for a sufiicient distance to become cool and hard before they come into contact with one another.

7. The method of producing sodium bisulphate in globular form having hard, smooth into small drops, scattering said drops in diflerent directions in a gaseous medium as them a suflicient distance to become cool and hard bzlfore they come into contact with one an- 0 er. 1 p

8. As a new product, sodium bisul hate in the formof substantially spherica dense,

hard, non-porous, discrete particles having smooth and uninterrupted surfaces.

' In testimony whereof we have signed the foregoing specification.

" CLARENCE BLINVILLE.

I ems. nmusme. 

